About ERA

Earned run average (ERA) is a metric that shows how many earned runs on average, a pitcher or team's pitcher, gives up over the course of nine innings. It is calculated by dividing earned runs by innings pitched then multiplying the result by 9. Generally, for ERA, lower is better. (Source)

Top Louisville Colonels Players by ERA

Which Louisville Colonels players rank highest in ERA? Below are the top ten by single season and by career totals with the team, requiring at least 50 innings pitched for a season record, or 100 innings pitched for a career record with the team.
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Louisville Colonels ERA Per Season

Louisville Colonels's ERA for each season of their history, plotted alongside yearly averages for MLB, the American Association, and the American Association.
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Louisville Colonels ERA Season Distribution vs. MLB and Peers

Each box summarizes ERA across all seasons, comparing the Louisville Colonels to MLB as a whole, the American Association, and the American Association. The box covers the middle 50% of seasons, the center line is the median, and the whiskers extend to the min and max values.
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Louisville Colonels ERA Year-Over-Year Change

A waterfall chart showing how the Louisville Colonels's ERA shifted season over season. Each bar represents the change from the previous year, making it easy to spot peak and decline phases.
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Louisville Colonels ERA — Season-by-Season Breakdown

Every season of Louisville Colonels's history with ERA alongside yearly averages for MLB, the American Association, and the American Association. Career totals include sum, average, minimum, maximum, and median.
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